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Finding the Fourth Proportional to 667,982.12, 921,796.26 and 381,496.28

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Solution

The fourth proportional to 667,982.12, 921,796.26 and 381,496.28 is: 526,453.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,982.12 : 921,796.26 = 381,496.28 : x
  2. Step 2: Convert to fraction form
    667,982.12/921,796.26 = 381,496.28/x
  3. Step 3: Cross multiply
    667,982.12x = 921,796.26 × 381,496.28
  4. Step 4: Simplify right side
    667,982.12x = 351,661,844,107.91
  5. Step 5: Solve for x
    x = 351,661,844,107.91/667,982.12
  6. Step 6: Final answer
    x = 526,453.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.